Immersion heater



Feb. 26, 1929.

L. P. HYNES IMMERSION HEATER Filed Dec. 6, 1924 2 Sheets-Sheet 1INVENTOR LEE P. HYNES ATTORNE Patented Feb. 26 1929.

sra'rss ita-tn PATENT OFFICE.

LEE P. HYHES, 0F ALBANY, TNEVV YORK, ASSIGNOR TO HYNES & COX ELECTRICC633,- PQRAIION, 01E ALBAlQY, NEVJ YORK, A CORPORATION OI NEW YORK.

IMMERSIONHEATER.

a raisal filed December 6, 1924. Serial No. raises.

description of the present /ention reference may be had ciiication theac- T'S forming a part thereof,

e electric heating oi fluids in or other containers. par e is soorganised as to avoid laceinent of a burned out coil, or e a coil ofpower, is desired. 3' device is also a simple, cheap rug ed and at itsleft end is the user of a screwplug its flush with the said floor E. iesaid plug contains the Beside the or in hollow threaded and thechambered hexagonal head To one fiat face of head B is fastened anangle-plate l? which is to form the bottom o5 a junction box or chamberand is provided. if desired, with an openin h within which a conduittube may be fastened. In Fig. 3, which illustrates the heating element,la is plate of thin sheet metal having its side edges turned over tooverlap the side edges 031' a similar plate J. Between the said platesthere is a flat heating coil suitably em bedded in refractoryinsulation. Such a coil is a familiar device that does not requireillustration. L and M are the insulated terminals of the coil which arelocated on the side of the plate J at the outer end thereof. The plate His turned up at its outer end to form a lip K which when the heatingelement is thrust into the sheath-plug of Fig. 2, will abut against thedown-turned lip A of plate P. Then a Ushaped plate C, Fig. l, is placedaround the plate P, its two ends abutting the "face oi the head B.Finally a screw-bolt is passed through the overlapping lips K and andthrough the fiat end of plate C. This single bolt secures all of theparts firmly together, producing the completed article as shown in l.This instrument may be readily inserted in a tank, boiler or othervesdraini the tanlr or boiler" and rugged, "simply made manipu sel andthe part Gr screwed into an dinary pipe-ta on the vessel.

example, l have shown at a tubular cont her connections r culation Thecon insertion scribed t ward insi tion sci c junction be oeneath it.pocket opens outside of the c: electric heat may be readily as abovedescribed by the juncti ing or ei or- For ainer sorted tl" with itsterminals enclos :1 ho" .volves no d to shut 0 nor 0 from the largecontainer V1 inns in place the heating element can be readily removedleaving he sheath-plug in place constituting a sealed pocket immersed inthe fluid in the res sel into which pocket another, or the same, heatingelement may be thrust and secured as above described. The instrument isstr and is c ieap to manufacture.

it is also desirable in certain cases to give the instrument a higherrating watts per heater than permitted by the degree of thermalconnection between the heating element and the sheath that is attainablein the precise arrangement above described. In such cases I mayintroduce a filling material of suitable thermal conductivity betweenthe heating elet ment and the surrounding sheath. Preferably'l fill thesheath with such material in a liquid or semi-plastic condition. Then. Iinsort the heater which, as it is pushed in dis places and squeezes outthe excess material leaving the heating element in the sheath surroundedwith a very thin film oi the said rea terial. This material also fillsup the space on plate J between the overlapping edges of plate H, asappears in the cross sectional view in Fig. 6 taken through the pocket Dof the sheath-plug and the heater encased thereby;

What ll claim as new and desire to secure by Letters Patent is:

1. An niersion heater comprising a sheath member, a heater clementcomplemental to and reuiovably positioned within said sheath member soas to have one end project therefrom, and means carried by said sheathmember ml positioned 51a.

engage the promay sheath member, said heater element having oiiset lip,and means carried by the sheath member and cooperating with said lip tonormally prevent withdrawal or said'heater element d. An immersionheater comprising a sheath member, a heater element complemental to andremovahly positioned within said sheath member said heater elementhaving an ofiset lip, and an angle plate carried by said sheath memberand cooperating with said lip to normally prevent withdrawal of saidheater element,

50 An immersion heater comprising 'a sheath closed at one end and openat the other, an attaching plug having an opening within which the openend of said sheath is secured, a heater element complemental to saidsheath and removably positioned therein so as to have one end projectingtherefrom, and means carried by said plug and positioned to engage theprojecting portion of said heater element for normally preventingWithdrawal thereof from said sheath.

6. An immersion heater comprising a sheath closed at one end and open atthe other, an attaching plug having an opening within which the open endof said sheath is secured, a heater element complemental to said sheathand positioned therein, and an angle plate exteriorly attached to saidplug and positioned to normally prevent withdrawal of said heaterelement.

7. An immersion i heater comprising a sheath closed at one end and openat the other, an attaching plug having an opening Within which the openend of said sheath is secured, a heater element complemental to saidsheath andremovably positioned therein, said heater element having anoffset lip, and means carried by said plug and cooperating with said lipto normally prevent withdrawal of said heater element.

8. The combination with a sheath member .of a heater element removabletherefrom at will, said heater element consisting of two superposedplates having a heater coil interosed between them, one of said plateshavlng itsside edges overlapping the contiguous edges of the otherplate, and means carried 1' q t I mosses by said sheath and cooperatingwith the last mentioned plate to normally prevent withdrawal of theheater element from said sheath.

9. The combination with a sheath member of a heater element rcmovablypositioned therein, said heater element consisting of two superposedplates having a heater coil interposed between them, one of said plateshaving its side edges overlapping the contiguous edges of the otherplate, the last mentioned plate having a lip at one end, and meanscarried by said sheath and cooperating with said lip to normally preventwithdrawal of said heater element.

10. The combination with a sheath member, of a heater element removablypositioned therein, said heater element consisting of two superposedplates normally held against separation and having a heating coilinterposed between them, one oif said plates having an offset lip at oneend, and means can ried by said sheath and cooperating with said lip tonormally prevent withdrawal of said heater element from said sheath,

11. The combination with a sheath member, of a heater element positionedtherein and removable therefrom at will, said heater element consistingof two superposed plates having a heating coil interposed between them,the edges of one of said plates overlapping the contiguous edges of theother plate, and a filling of thermal conducting material interposedbetween the heater element and the sheath membeix 12. The combinationwith a sheath member, of a heater element positioned therein andremovable therefrom at will, a filling of thermal conducting materialinterposed between the heater element and the sheath, and means normallypreventing withdrawal of said heater element.

13. An immersion heater comprising a sheath member, a heaterelementpositioned therein andremovable therefrom at will,

said sheath member and said heater member having complemental means fornormally preventing Withdrawal of said heater element, and meanscooperating with said withdrawal-preventing means for forming a junctionlJOiL 14. An immersion heater comprising a sheath member, a heaterelement removably positioned therein and provided with a lip an angleplate carried by said sheath member and cooperating with said lip tonormally prevent withdrawal of said heater element, and side platescooperating with said lip and said angle plate to form a junction box.

v Signed at Albany, county of Albany and State of New York, this 22ndday of November, 1924.

' LEE P. HYNES,

